QAM 源码搜索结果, 第90页, Verysource

高阶QAM调制下基于对数似然比门限的自适应解调方案高阶QAM调制下基于对数似然比门限的自适应解调方案
Optimized SCMA Codebook Design by QAM Constellation Segmentation... Optimized SCMA Codebook Design by QAM Constellation Segmentation with Maximized MED
1.2 Tb/s (12×100Gb/s) Nyquist 32-QAM Subcarrier Modulation WDM T... 1.2 Tb/s (12×100Gb/s) Nyquist 32-QAM Subcarrier Modulation WDM Transmission with Direct Detection
光相干QAM信号的弹性DAML相位估计提出相干光通信系统的弹性判决辅助式最大似然（DAML）相位估计算法，将弹性DAML相位估计算法从相移键控（PSK）系统扩展到正交幅度调制（QAM）系统，并进行相位估计误差推导。仿真结果表明，弹性DAML在不同块长度条件下存在误比特率（BER）下界，能消除传统DAML的块长度效应，可有效降低符号检测过程对信号相位波动的要求，进而放宽相干光系统对激光器线宽的限制。
Improved m-QAM-OFDM transmission for underwater wireless optical... Improved m-QAM-OFDM transmission for underwater wireless optical communications
基于IQ光调制的16-QAM光发射机多偏置电压反馈控制性能分析主要研究基于IQ光调制器的16进制正交振幅调制(16-QAM)光发射机中多偏置电压反馈控制性能,着重分析了装置内部两个马赫曾德尔调制器(MZM)的偏置电压与马赫曾德尔干涉仪(MZI)的偏置电压之间的协同控制问题,以及以光发射机的平均输出光功率作为反馈控制两个MZM偏置电压的监测信号所面临的多极值问题。研究证明了当MZM偏置电压处于传输曲线的最低点时监测的输出光功率为极值,且不受MZI偏置电压的影响。分析发现,合适的驱动信号幅度可保证两个MZM偏置电压的反馈控制过程中不存在多局部极值问题。
40-Gb/s star 16-QAM transmitter based on single dual-drive Mach-... We propose a 40-Gb/s star 16-ary quadrature amplitude modulation (16-QAM) transmitter using a single dual-drive Mach-Zehnder modulator (DDMZM). This transmitter is demonstrated through experiment and simulation and shows the advantage of simplicity for ...
Experimental Demonstration of Real-Time High-Level QAM-Encoded D... Experimental Demonstration of Real-Time High-Level QAM-Encoded Direct-Detection Optical OFDM Systems
16-QAM_Transmitter_Pluto-SDR：使用ADALM-Pluto SDR的基于Python的16-QAM通信... 16-QAM_Transmitter_Pluto-SDR 使用ADALM-Pluto SDR的基于Python的16-QAM通信协议发送器
Perfect 8-QAM+ Sequences This letter investigates the construction methods of perfect 8-QAM+ sequences, which relate to one of three open problems proposed by Boztas and Parampalli in 2010, and two constructions that transform the known perfect ternary sequences (PTSs) into the ...

关键字：QAM